(1) Any person who executes any works of drainage shall provide to the duly authorised officer of the Sewerage Authority all labour and materials which may be needful to ensure that such works comply with the requirements of this Act and every drain shall be tested by applying a head of water 2 feet in excess of the maximum depth of the drain measured from ground level. The drain shall be watertight under such head of water.
(2) Soil pipes, ventilating pipes and waste water pipes may be tested by subjecting them to an air pressure equivalent to 5 inches of water or by such other reasonable tests as the officer carrying out the inspection may require and such pipes shall be airtight or watertight.
(3) Any defects in the drainage which may be found as a result of tests or inspections as aforesaid shall be made good in such a manner as to conform to the requirements of this Act and no work which fails so to conform shall be used or permitted to be used.